CN102849051A - Parking brake control system and control method applied to automatic gearbox - Google Patents
Parking brake control system and control method applied to automatic gearbox Download PDFInfo
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- CN102849051A CN102849051A CN2012103674257A CN201210367425A CN102849051A CN 102849051 A CN102849051 A CN 102849051A CN 2012103674257 A CN2012103674257 A CN 2012103674257A CN 201210367425 A CN201210367425 A CN 201210367425A CN 102849051 A CN102849051 A CN 102849051A
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Abstract
The invention discloses a parking brake control method applied to an automatic gearbox. An electronic parking brake system is adopted and is used for receiving signals of a gear shifting position selecting device of the automatic gearbox, when the gear is in a parking gear (gear P), the electronic parking brake system identifies the parking slope of a vehicle according to state signals of the vehicle, under the condition that the slope is greater, a parking executing mechanism can be automatically controlled for parking, and the safe parking of the vehicle is ensured. The parking brake control method is used as an advanced parking brake technology, states of the vehicle and the control intension of a driver can be automatically identified, the parking is automatically carried out, the driving convenience is improved, in addition, the driver can be assisted to start on a slope road, the sliding risk in the starting process is avoided, and the driving safety is improved.
Description
Technical field
The invention belongs to the self-propelled vehicle emergency brake system manufacturing technology field that is applied to, specifically, relate to a kind of braking during standstill control system and control method that is applied to automatic transmission with hydraulic torque converter.
Background technology
At present, in self-propelled vehicle emergency brake system manufacturing technology field, particularly be applied to braking during standstill control system and the control method of automatic transmission with hydraulic torque converter, more and more receive automaker and customer's concern.For vehicle with automatic transmission, be provided with lockout mechanism although its Automatic Transmission is inner, the output shaft of change speed gear box can be pinned to stop the rolling of drive wheel, on the ramp or during other complex road conditions, in order to guarantee the emergency of vehicle, still need halting mechanism to carry out Parking.
The parking and braking mechanism that is applied to Automatic Transmission of the prior art, on the ramp, only undertaken in the situation of Parking by park (P shelves), after vehicle with automatic transmission switches to driving shelves (D shelves or R shelves) from park (P shelves) during starting, go accelerator pedal to carry out in the process of driveaway operation at the chaufeur loosen the brake, the power of possible vehicle does not also enough drive vehicle driving up and exercises, but this moment, braking force was also cancelled the situation that will occur slipping under the vehicle like this.Therefore, braking during standstill control system of the prior art and control method and control program cause the danger of slide car because of under power in the time of can not effectively solving vehicle start, will lead to a disaster when serious.Simultaneously, can not automatically implement braking during standstill or discharge braking during standstill according to different operating modes and road conditions in the prior art, traveling comfort and safety be all relatively poor.
Summary of the invention
Technical matters to be solved by this invention is, when adopting the Parking of prior art scheme, only rely on the Automatic Transmission internal locking mechanism, the output shaft of change speed gear box is pinned to stop the mode of the rolling of drive wheel, cause the danger of slide car in the time of can not effectively solving vehicle sloping route starting because of under power, will lead to a disaster when serious.Simultaneously, can not automatically implement braking during standstill or discharge braking during standstill according to different operating modes and road conditions in the prior art, traveling comfort and safety be the technical matters such as relatively poor all, and a kind of braking during standstill control system and control method that is applied to automatic transmission with hydraulic torque converter is provided.
Technical conceive of the present invention is, the invention provides a kind of electronic brake system, receive the drive range signal by electronic brake system, obtain simultaneously speed of a motor vehicle model, and by the residing ramp of sensor senses vehicle situation, carry out comprehensive analysis and judgement, control Parking actuating unit carried out automatic parking when then identification of driver will stop, thereby the purpose of braking during standstill or release braking during standstill is implemented in arrival automatically according to different operating modes and road conditions.
Technical scheme provided by the present invention is, a kind of braking during standstill control system that is applied to automatic transmission with hydraulic torque converter, described braking during standstill control system comprises electronic brake system and automatic transmission control system, and described electronic brake system links to each other by the CAN bus with described automatic transmission control system.
Described electronic brake system comprises electronic parking control unit, Parking actuating unit and obliquity sensor, and described electronic parking control unit links to each other with the AUTO switch with the Parking actuating unit respectively.
Described electronic parking control unit links to each other with control unit of engine by the CAN bus, and described control unit of engine links to each other with described accelerator pedal signal sensor, engine torque signal sensor, brake pedal signal transducer; Described electronic control unit receives accelerator pedal signal, engine torque signal, the brake pedal signal from control unit of engine.
Described electronic parking control unit links to each other with the ABS/ESP control unit by the CAN bus, and described ABS/ESP control unit links to each other with vehicle speed signal sensor, Wheel speed signal sensor; Described electronic control unit receives vehicle speed signal and the wheel speed signal from the ABS/ESP control unit.
Described automatic transmission control system comprises control unit for automatic shift, Automatic Transmission actuating unit and gear positions selecting arrangement, and described control unit for automatic shift links to each other with the gear positions selecting arrangement with described Automatic Transmission actuating unit respectively.
Described electronic control unit receives the gear positions signal from control unit for automatic shift.The described control system of described AUTO switch (7) opening and closing.
A kind of braking during standstill control method that is applied to automatic transmission with hydraulic torque converter, comprise electronic brake system, described electronic brake system receives the signal of the drive range selecting arrangement of automatic transmission with hydraulic torque converter, when gear is in park (P shelves), electronic brake system is according to the status signal of vehicle, and the residing gradient of identification vehicle is in the larger situation of the gradient, can automatically control the Parking actuating unit and carry out Parking, guarantee the emergency of vehicle.
Described electronic brake system comprises electronic parking control unit and Parking actuating unit, the electronic parking control unit can receive the signal of obliquity sensor signal, drive range selecting arrangement, and can obtain A/T gear position status signal, accelerator pedal signal, engine torque signal, engine rotational speed signal and vehicle speed signal etc., and carry out computing, make correct analysis and judge, control Parking actuating unit is carried out Parking or is discharged Parking.
Described automatic transmission control system comprises control unit for automatic shift and Automatic Transmission actuating unit, and described control unit for automatic shift can be exported the information such as range state of signal and the change speed gear box of drive range selecting arrangement; Described control unit for automatic shift can receive and process the Parking signal of electronic parking control unit, and after the electronic parking control system Parking, automatic transmission with hydraulic torque converter cuts off power output automatically.
Described electronic parking control unit can receive and process the Parking command signal of control unit for automatic shift, after control unit for automatic shift sends the Parking order, the electronic parking control unit is in the situation that vehicle is in staticly, and control Parking actuating unit is carried out Parking.
Adopt technical scheme provided by the present invention, can effectively solve when adopting the Parking of prior art scheme, only rely on the Automatic Transmission internal locking mechanism, the output shaft of change speed gear box is pinned to stop the mode of the rolling of drive wheel, cause the danger of slide car in the time of can not effectively solving vehicle sloping route starting because of under power, will lead to a disaster when serious; Can not automatically implement braking during standstill or discharge braking during standstill according to different operating modes and road conditions in the prior art, traveling comfort and safety be the technical matters such as relatively poor all, simultaneously, technical scheme provided by the present invention also has the braking during standstill technology as a kind of advanced person, can automatically identify vehicle-state and chaufeur control intention, automatically carry out Parking, not only improved the convenience of driving, and can start to walk in the ramp by driver assistance, avoid the risk of slide car in the starting-up process, improve the safety of driving.
Description of drawings
By reference to the accompanying drawings, the present invention is further illustrated:
Fig. 1 system architecture diagram of the present invention
Fig. 2 Parking control flow of the present invention Fig. 1
Fig. 3 Parking control flow of the present invention Fig. 2
Wherein, 1 is the electronic parking control unit; 2 are the Parking actuating unit; 3 is obliquity sensor; 4 is control unit for automatic shift; 5 is the Automatic Transmission actuating unit; 6 is the drive range selecting arrangement; 7 is the AUTO switch; 8 is control unit of engine; 9 is accelerator pedal signal; 10 is engine torque; 11 is the brake pedal signal; 12 is the CAN bus interface; 13 is ABS or ESP control unit; 14 is vehicle speed signal; 15 is wheel speed signal.
The specific embodiment
The present invention relates to electronic brake system and automatic transmission with hydraulic torque converter control system and the control method in the vehicle parking process, particularly, of the present invention is a kind of braking during standstill control system and control method that is applied to automatic transmission with hydraulic torque converter, received the signal of drive range selecting arrangement 6 by electronic brake system, electronic brake system can automatic parking during to park (P shelves) with gear switch for chaufeur behind vehicle stop.
The present invention designs a kind of braking during standstill control system and control method that is applied to automatic transmission with hydraulic torque converter, received the signal of drive range selecting arrangement 6 by electronic brake system, obtain simultaneously vehicle speed signal 14, and in conjunction with the residing ramp of vehicle situation, analyze judgement, control Parking actuating unit 2 is held and is carried out Parking when identification of driver will stop.
The present invention designs a kind of braking during standstill control system and control method that is applied to automatic transmission with hydraulic torque converter, relates to electronic brake system and automatic transmission control system:
Wherein electronic brake system can be drag-line or clamp integrated form, generally by electronic parking control unit 1 and Parking actuating unit 2, electronic parking control unit 1 can be controlled the motor rotation of Parking actuating unit 2, applies braking force or brake off power to wheel.
Wherein automatic transmission control system can be AT, CVT, DCT or AMT etc., generally is made of drive range selecting arrangement 6, control unit for automatic shift 4 and Automatic Transmission actuating unit 5.Control unit for automatic shift 4 is according to the signal of drive range selecting arrangement 6, and gear and the transmission engine power of control Automatic Transmission actuating unit 5 are exported.
The present invention designs a kind of Parking control method that is applied to automatic transmission with hydraulic torque converter, and its control mainly comprises Parking control when stopping, its feature mainly comprise following some:
1, P shelves parking function, electronic brake system receives the signal of the drive range selecting arrangement 6 of automatic transmission with hydraulic torque converter, when gear is in park (P shelves), electronic brake system is according to the status signal of vehicle, the residing gradient of identification vehicle, in the larger situation of the gradient, can automatically control Parking actuating unit 2 and carry out Parking, guarantee the emergency of vehicle.
2, a button switch (AUTO key switch) is set, utilizes this button to activate and close the P shelves parking function of electronic brake system.
3, control unit for automatic shift 4 intercoms mutually with electronic brake system, gear is in driving shelves (D shelves or R shelves), behind vehicle parking, control unit for automatic shift 4 sends order for electronic parking control unit 1, and request electronic parking control unit 1 carries out Parking.
4, after the vehicle Parking, electronic parking control unit 1 sends a signal to control unit for automatic shift 4, and control unit for automatic shift 4 can be controlled and cut off power output, with the mechanical part of protection Automatic Transmission.
Above-mentioned vehicle gradient size of living in is to detect by the obliquity sensor 3 that is installed on vehicle body to obtain, demarcate by experiment automobile and be positioned at the value of the situation angle of declination sensors 3 such as level land, slope, EPB compares signal and the calibration value that obliquity sensor 3 passes in practice, thereby judges the vehicle gradient of living in.
Be illustrated in figure 1 as a kind of braking during standstill control system of automatic transmission with hydraulic torque converter and system architecture diagram of control method of being applied to involved in the present invention.Electronic parking control unit 1 consists of electronic brake system with Parking actuating unit 2, for vehicle provides braking during standstill.Electronic parking control unit 1 is integrated with obliquity sensor 3, is used for the residing gradient size of identification vehicle.The automatic transmission control system that control unit for automatic shift 4, Automatic Transmission actuating unit 5 and drive range selecting arrangement 6 consist of can transmit engine torque 10, for Vehicle Driving Cycle provides power.Drive range selecting arrangement 6 is sent to control unit for automatic shift 4 with the gear desired signal of chaufeur, electronic parking control unit 1 intercoms mutually by CAN bus interface 12 and control unit for automatic shift 4, and obtain the signal of drive range selecting arrangement 6 and the range state of automatic transmission with hydraulic torque converter, electronic parking control unit 1 communicates by CAN bus interface 12 and control unit of engine 8, ABS or ESP control unit 13, obtains the information such as engine torque 10, accelerator pedal signal 9, brake pedal signal 11, wheel speed signal 15.For the automatic transmission with hydraulic torque converter that does not have park (P shelves), be connected with the electronic brake unit by AUTO switch 7, be used for the automatic parking function of active electron emergency brake system.
Fig. 2 and the dual mode that Figure 3 shows that Parking control flow of the present invention.Mode shown in Figure 2 is to carry out Parking by control unit for automatic shift 4 order electronic brake systems, step S1 electronic parking control unit 1 calculates the speed of a motor vehicle and identifies stopping of vehicle, behind vehicle stop, electronic parking control unit 1 could be carried out the Parking order of control unit for automatic shift 4, execution in step S3.Mode shown in Figure 3 is to select park (P shelves) when the shift pattern selecting arrangement, whether step S5 electronic parking control unit 1 calculates the residing gradient size of vehicle greater than the Safety Slope of setting, if greater than the safety value of setting, then execution in step S6 control Parking actuating unit 2 Parkings.
Claims (10)
1. braking during standstill control system that is applied to automatic transmission with hydraulic torque converter, it is characterized in that, described braking during standstill control system comprises electronic brake system and automatic transmission control system, and described electronic brake system links to each other by the CAN bus with described automatic transmission control system.
2. a kind of braking during standstill control system that is applied to automatic transmission with hydraulic torque converter according to claim 1, it is characterized in that, described electronic brake system comprises electronic parking control unit (1), Parking actuating unit (2) and obliquity sensor (3), and described electronic parking control unit (1) links to each other with AUTO switch (7) with Parking actuating unit (2) respectively.
3. a kind of braking during standstill control system that is applied to automatic transmission with hydraulic torque converter according to claim 1 and 2, it is characterized in that, described electronic parking control unit (1) links to each other with control unit of engine (8) by the CAN bus, and described control unit of engine (8) links to each other with described accelerator pedal signal (9) sensor, engine torque (10) signal transducer, brake pedal signal (11) sensor; Described electronic control unit receives accelerator pedal signal (9), engine torque (10) signal, the brake pedal signal (11) from control unit of engine (8).
4. a kind of braking during standstill control system that is applied to automatic transmission with hydraulic torque converter according to claim 3, it is characterized in that, described electronic parking control unit (1) links to each other with ABS or ESP control unit (13) by the CAN bus, and described ABS or ESP control unit (13) link to each other with vehicle speed signal (14) sensor, wheel speed signal (15) sensor; Described electronic control unit receives vehicle speed signal (14) and the wheel speed signal (15) from ABS or ESP control unit (13).
5. a kind of braking during standstill control system that is applied to automatic transmission with hydraulic torque converter according to claim 4, it is characterized in that, described automatic transmission control system comprises control unit for automatic shift (4), Automatic Transmission actuating unit (5) and gear positions selecting arrangement, and described control unit for automatic shift (4) links to each other with the gear positions selecting arrangement with described Automatic Transmission actuating unit (5) respectively.
6. a kind of braking during standstill control system that is applied to automatic transmission with hydraulic torque converter according to claim 1 and 2 is characterized in that, the described control system of described AUTO switch (7) opening and closing.
7. braking during standstill control method that is applied to automatic transmission with hydraulic torque converter, it is characterized in that, comprise electronic brake system and automatic transmission control system, described electronic brake system receives the signal of the drive range selecting arrangement (6) of automatic transmission with hydraulic torque converter, when gear is in park (P shelves), electronic brake system is according to the status signal of vehicle, the residing gradient of identification vehicle, in the larger situation of the gradient, can automatically control Parking actuating unit (2) and carry out Parking, guarantee the emergency of vehicle.
8. a kind of braking during standstill control method that is applied to automatic transmission with hydraulic torque converter according to claim 7, it is characterized in that, described electronic brake system comprises electronic parking control unit (1) and Parking actuating unit (2), electronic parking control unit (1) can receive obliquity sensor (3) signal, the signal of drive range selecting arrangement (6), and can obtain the A/T gear position status signal, accelerator pedal signal (9), engine torque (10) signal, engine rotational speed signal and vehicle speed signal (14) etc., and carry out computing, make correct analysis and judge, control Parking actuating unit (2) is carried out Parking or is discharged Parking.
9. a kind of braking during standstill control method that is applied to automatic transmission with hydraulic torque converter according to claim 8, it is characterized in that, described automatic transmission control system comprises control unit for automatic shift (4) and Automatic Transmission actuating unit (5), and described control unit for automatic shift (4) can be exported the signal of drive range selecting arrangement (6) and the information such as range state of change speed gear box; Described control unit for automatic shift (4) can receive and process the Parking signal of electronic parking control unit (1), and after the electronic parking control system Parking, automatic transmission with hydraulic torque converter cuts off power output automatically.
10. a kind of braking during standstill control method that is applied to automatic transmission with hydraulic torque converter according to claim 9, it is characterized in that, described electronic parking control unit (1) can receive and process the Parking command signal of control unit for automatic shift (4), after control unit for automatic shift (4) sends the Parking order, electronic parking control unit (1) in the situation that vehicle be in static, control the Parking actuating unit (2) carry out Parking.
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| CN201210367425.7A CN102849051B (en) | 2012-09-26 | 2012-09-26 | A kind of braking during standstill control system and control method being applied to automatic transmission with hydraulic torque converter |
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| CN201210367425.7A CN102849051B (en) | 2012-09-26 | 2012-09-26 | A kind of braking during standstill control system and control method being applied to automatic transmission with hydraulic torque converter |
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